What di it mean if you have a dream about someone telling you that you are pregnant?

Dreams are about the dreamer, so it is very unlikely that one would receive information about someone else's pregnancy in a dream. It might reflect the dreamer's feelings for that "someone," that they are "full" of ideas or creativity or that they are literally or figuratively "fertile." Alternatively, the "someone" could represent the dreamer, so if the dreamer is a sexually active female of childbearing age, a pregnancy test would not be a bad idea.

Another Answer:You may have anxiety about things you have done. Unresolved issues. In the dream, are you being accused of something? Or is the person simply a friend of yours? It is very different when your girlfriend tells you she is pregnant than when a coworker confides in you, or your mother happens to mention it...

Dreams are hard to interpret even when they seem very clear. Often I suspect there is no real interpretation. One useful technique for extracting meaning from dreams is to assume that each character in the dream is you, or represents some part of your own psyche.